1366 - Incorrect integer value: '' for column `shop_db3`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '91c82c22bc973036b71193f3ac891d2d', '44.197.214.36', '1711724162', '1711724162', '/product_info.php?info=p302_Frecher-Lauser.html&XTCsid=7449276e387898a36bd6271988bac6c7')

[XT SQL Error]